• 제목/요약/키워드: Korean Photography

검색결과 579건 처리시간 0.022초

새로운 ICP 장치를 이용한 고온 초전도체의 Dry Etching과 기존의 Wet Etching 기술과의 비교 (Comparison of the Existing Wet Etching and the Dry Etching with the ICP Process Method)

  • 강형곤;임성훈;임연호;한윤봉;황종선;한병성
    • 한국전기전자재료학회논문지
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    • 제14권2호
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    • pp.158-162
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    • 2001
  • In this report, a new process for patterning of YBaCuO thin films, ICP(inductively coupled plasma) method, is described by comparing with existing wet etching method. Two 100㎛ wide and 2mm long YBaCuO striplines on LaAlO$_3$ substrates have been fabricated using two patterning techniques. And the properties were compared with the critical temperature and the SEM photography. Then, the critical temperatures of two samples were about 88 K, but the cross section of sample using ICP method was shaper than that using the wet etching method. ICP method can be used as a good etching technique process for patterning of YBaCuO superconductor.

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레이저 스페클간섭법에 있어서 스페클크기와 측정 한계에 관한 연구 (A study on speckle size and measurable limitations in laser speckle interferometry method)

  • 윤성운
    • 한국생산제조학회지
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    • 제5권1호
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    • pp.33-42
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    • 1996
  • The high coherence of laser beam has made it possible to observe interference effects even in the light scattered from rough surfaces. That's why, when object with a scattering surface is illuminated with laser light, we do see a speckled appearance due to random interference. This sort of unique property of laser speckle has bruht into existence the new noncontaciting techniques such as speckle metrology method of measuring deformation, displacement, and vibration etc of objects with high optical sensitivity. The measurable range of speckle metrology especially used to measure in -plane information, however, is limited by some factors, the so-called strain, rotation tilt of surface and out of displacement perpendicular to the plane of analysis This restrictions severly limits the measurable range of speckle metrology by causing the decorrelation of speckle patterns. It is the purpose of this paper to give a survey on the measurable limitation of speckle photography method that is one of speckle metrology. Namely we will discuss the mutual relationships and problems of each limitations adding the restriction on the largest and smallest displacement measurable with speckle methods.

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스텐실 제작용 레이저 공정기술 개발 (Development of laser process for stencil manufacturing)

  • 신동식;이영문;이제훈
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 1997년도 추계학술대회 논문집
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    • pp.989-992
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    • 1997
  • The objective of this study is to develop stencil cutting process and determine optimal conditions which make good-quality stencil by using a Nd:YAG laser. The effects of process parameters such as laser power, type of mask, gas pressure, cutting speed and pulse width on the cut edge quality were investigated. In order to analyze the cut surface characteristics(roughness, kerf width, dross) optical microscopy, SEM photography and roughness test were used. A a results, the optimal conditions of process parameters were determined, and the practical feasibility of the proposed system is also examined by using a commercial gerber file for PCB stencil manufacturing.

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지구과학교육에서 소형 천체망원경을 활용하는 방법 (A Method of Utilizing Small Astronomical Telescopes in Earth Science Instruction)

  • 김경임;이염범
    • 천문학논총
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    • 제2권1호
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    • pp.47-60
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    • 1985
  • Four observational astronomical item, have been pilottested with a 150mm refracting telescope in order to layout the detailed procedures for the suggested (inquiry) activities listed in the high school earth science curriculum and to contrive some adequate instructions for students stressed on how to make proper treatments with the collected materials. The tested items were of sunspots' motion, the size of lunar craters, the Galilian satellites' revolution, and the galactic distribution of stars. Following series of activities are suggested with respect to the way of collecting observational data and of giving proper instruction to students in class: 1) Photography and other material, he made by teacher and/or extracurricular group of students; 2) Replicas (xeroxed, photographs, Or slides) he made from the collected materials, '0 that they are available to all the students in class; 3) Quantative analyses, be taken as student' activity.

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FCB GRID 상품분류에 의한 패션잡지 광고 분석 (Analysis of Fashion Magazine Advertising by FCB GRID)

  • 홍병숙
    • 대한가정학회지
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    • 제44권1호
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    • pp.159-168
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    • 2006
  • The purpose of this study was to analyse the types of expression of fashion magazine advertising using the Foote, Cone and Belding(FCB) GRID model. Consequently, this study examined the presentation of fashion magazine advertising. The fashion magazine advertising(771 cases in women's magazines, 120 cases in men's magazines) was classified according to the FCB GRID model. The fashion magazine advertising was categorized into high involvement-feeling goods(jewelry, accessories, bags, shoes, perfumes, men and women dresses, jeans, bathing suits etc.), low involvement-feeling goods(casual wears, imitation accessories etc.), high involvement-thinking goods(cosmetics, underwears, sports shoes etc.) and low involvement-thinking goods(hair goods, sports wears, undergarments etc.). A great of the fashion advertising consisted of photography and the emotional approach. Thinking goods placed emphasis on the functional value, whereas high involvement-feeling goods placed emphasis on the emotional value and low involvement-feeling goods on the fashionable value.

DME 예혼합 자기착화 연소중의 디젤분무연소에 관한 연구 (The Investigation of Diesel Spray Combustion in DME HCCI Combustion)

  • 임옥택
    • 대한기계학회논문집B
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    • 제32권4호
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    • pp.241-248
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    • 2008
  • The purpose of the research is to investigate of diesel spray combustion for simultaneously reduction way of NOx and PM. The diesel injection were done into intermediates that are generated by very lean DME HCCI combustion using a RCM. The concentration of intermediate could not be directly measured, so we estimated it by CHEMKIN calculation. Two dimensional spontaneous luminescence images which are created by chemical species reaction at low temperature reaction (LTR) and high temperature reaction (HTR) are captured by using a framing streak camera. Also, combustion events were observed by high-speed direct photography. The ignition and combustion events were analyzed by pressure profiles and the KL values and flame temperatures were analyzed by the two-color method.

염화(鹽化)트리페닐테트라졸륨에 의(依)한 종자활력검정(種子活力檢定)에 관(關)한 연구(硏究) (Seed Variability Test by 2,3,5-Triphenyltetrazolium Chloride)

  • 김삼식
    • 한국산림과학회지
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    • 제26권1호
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    • pp.23-30
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    • 1975
  • 임목종자(林木種子)의 활력검정(活力檢定)에 2,3,5-triphenyltetrazolium chloride 0.25-0.5%의 수용액(水溶液)으로 처리(處理)하여 얻은 결과(結果)는 X-ray 촬영법과 동일(同一)한 효과(効果)를 얻어 본(本) 시약(試藥)의 음용이 값싸고 우수한 종자활력검정(種子活力檢定) 방법(方法)임이 판명되었다.

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의류상품의 신문광고 효용에 관한 연구 -여성 기성복 광고를 중심으로- (A Study on Efficient Using of a Newspaper Fashion Advertising - Focused on Advertising for Women's Ready-to Wear-)

  • 김가영;이선재
    • 한국의류학회지
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    • 제19권2호
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    • pp.329-339
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    • 1995
  • This study intended to provide valuable basic data for an efficient using newspaper advertising to manufactures by investising and analyzing the character of newspaper as fashion advertising and media environment, consumer's attitude of advertising subscription, a degree of recognition and concern on a newspaper advertising and a degree of like on expressive form of a newspaper advertising. A question that is drawn up by researcher base on existing records and preceding study was used as major method for understanding consumer's consciousness. The sample group is composed of female students, working women, housewives who lives in Seoul. The results of this study were as follows. 1. Manufactures should be developing Headline in subject matter to get out of plain sale advertising and event advertising. 2. Manufactures should difference to understanding Illustration that consumer prefer. Also using of photography is efficient and it is importent to use of color advertising that appeal to consumer. 3. The informative advertising is a high degree of efficiency by reason that the newspaper offers great news source and information.

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Daum 이미지와 QuickBird 위성영상에 의한 NIR 밴드 추출과 정규화식생지수 (NDVI)에의 적용 (NIR Band Extraction for Daum Image and QuickBird Satellite Imagery and its Application in NDVI)

  • 나상일;박종화
    • 한국농공학회논문집
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    • 제51권4호
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    • pp.37-42
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    • 2009
  • This study extracted Near Infrared (NIR) band using Image Processing Technology (IPT), and calculated Normalized Difference Vegetation Index (NDVI). Aerial photography from Daum portal in combination with high resolution satellite image was employed to improve vegetation sensitivity by extracting NIR band and calculating NDVI with comparison to QuickBird result. The extracted NIR band and NDVI through IPT presented similar distribution pattern. In addition, a regression analysis by land cover character showed high correlation paddy and forest Therefore, this approach could be acceptable to acquire vegetation environment information.

정적 연소실 내에서의 2유체 가솔린 분사기의 착화 특성에 대한 실험적 연구 (An experimental study on the ignition characteristics of an air-assisted gasoline injector in a constant volume combustion chamber)

  • 이용표;김승수
    • 오토저널
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    • 제14권4호
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    • pp.31-38
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    • 1992
  • The objective of this study is to determine the ignition feasibility of a single shot, air-assisted gasoline fuel injector operated in a constant volume combustion chamber under atmospheric condition. A number of parameters has been selected for this experiments, such as dwelling time, spark gap position(r,z), spark electrode geometry, supplied air and fuel masses and spray cone deflector angle. On-site visual inspection of the instantaneous flame glow was chosen as one way to judge the successful ignition. In addition, chamber pressure and occasional photography were mobilized as for data recording. It was clearly observed that there was an entrainment air-fuel mixture toward spray axis from the spray formation and its development later on. The optimum ignition conditions were found for those parameters given above.

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